Created
June 14, 2023 02:01
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measuring IO with 1k samples of 1MB
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| #!/bin/bash | |
| directory=$1 # Replace with your designated directory | |
| # Function to measure write time | |
| measure_write_time() { | |
| local file="$1" | |
| local start_time=$(date +%s%N) | |
| dd if=/dev/zero of="$file" bs=1M count=1 status=none | |
| local end_time=$(date +%s%N) | |
| local elapsed_time=$((end_time - start_time)) | |
| local elapsed_time_ms=$(awk "BEGIN { printf \"%.2f\", $elapsed_time / 1000000 }") | |
| echo "$elapsed_time_ms" | |
| } | |
| # Function to measure read time | |
| measure_read_time() { | |
| local file="$1" | |
| local start_time=$(date +%s%N) | |
| dd if="$file" of=/dev/null bs=1M count=1 status=none | |
| local end_time=$(date +%s%N) | |
| local elapsed_time=$((end_time - start_time)) | |
| local elapsed_time_ms=$(awk "BEGIN { printf \"%.2f\", $elapsed_time / 1000000 }") | |
| echo "$elapsed_time_ms" | |
| } | |
| # Function to display progress bar | |
| progress_bar() { | |
| local width=50 | |
| local percent=$1 | |
| local num_chars=$((percent * width / 100)) | |
| local bar=$(printf "%${num_chars}s" | tr ' ' '#') | |
| local empty=$(printf "%$((width - num_chars))s" | tr ' ' ' ') | |
| printf "\r[%s%s] %d%%" "$bar" "$empty" "$percent" | |
| } | |
| # Perform measurements | |
| declare -a write_times | |
| declare -a read_times | |
| echo "Measuring write and read times..." | |
| for ((i=1; i<=100; i++)) | |
| do | |
| temp_file="$directory/temp_$i.txt" | |
| write_times[$i]=$(measure_write_time "$temp_file") | |
| read_times[$i]=$(measure_read_time "$temp_file") | |
| rm "$temp_file" | |
| progress=$((100 * i / 100)) | |
| progress_bar "$progress" | |
| done | |
| echo # Move to the next line after the progress bar | |
| # Calculate min, average, and max times | |
| min_write_time=$(echo "${write_times[*]}" | tr " " "\n" | sort -n | head -n 1) | |
| avg_write_time=$(echo "${write_times[*]}" | awk '{sum+=$1} END {printf "%.2f", sum/NR}') | |
| max_write_time=$(echo "${write_times[*]}" | tr " " "\n" | sort -n | tail -n 1) | |
| min_read_time=$(echo "${read_times[*]}" | tr " " "\n" | sort -n | head -n 1) | |
| avg_read_time=$(echo "${read_times[*]}" | awk '{sum+=$1} END {printf "%.2f", sum/NR}') | |
| max_read_time=$(echo "${read_times[*]}" | tr " " "\n" | sort -n | tail -n 1) | |
| # Print the results | |
| echo "Write times (in milliseconds):" | |
| echo "Minimum: $min_write_time" | |
| echo "Average: $avg_write_time" | |
| echo "Maximum: $max_write_time" | |
| echo | |
| echo "Read times (in milliseconds):" | |
| echo "Minimum: $min_read_time" | |
| echo "Average: $avg_read_time" | |
| echo "Maximum: $max_read_time" |
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